Sea cucumbers are echinoderms from the class Holothuroidea (/ ˌhɒləˌθjʊəˈrɔɪdiə, ˌhoʊlə -/ HOL-ə-thyuu-ROY-dee-ə, HOH-lə-). They are marine animals with a leathery skin and an elongated body containing a single, branched gonad. They are found on the sea floor worldwide.

2025年1月14日 · Sea cucumber, (class Holothuroidea), any of 1,200 species of marine invertebrates that constitute a class within the phylum Echinodermata. The soft cylindrical body, 2 to 200 cm (about 0.75 inch to 6.5 feet) long and 1 to 20 cm (0.4–8 inches) thick, is usually a dull, dark colour and often warty,

2024年12月5日 · Sea cucumbers, or holothurians, are marine invertebrates with elongated, cylindrical bodies covered in soft, leathery skin resembling the fruit of a cucumber plant. They are related to starfish, sea urchins, and feather stars and belong to the class Holothuroidea, one of the five extant classes within the phylum Echinodermata.

2019年10月16日 · Sea cucumbers have a relatively simple internal anatomy, consisting of three main sections: digestive, respiratory and reproductive, according to the book " Marine Benthic Fauna of...

2023年8月25日 · Find out what sea cucumbers eat and understand the anatomy of a sea cucumber. Updated: 08/25/2023. What is a Sea Cucumber? Sea cucumbers are a species of invertebrate under the phylum...

2019年12月20日 · Holothurians are uniquely anal respirators, meaning they breathe through their rear end. They have respiratory trees that act as ‘lungs’ to transfer oxygen into the body and get rid of carbon dioxide. Check out the diagram below …

2010年9月10日 · What is a sea cucumber? Sea cucumbers might look like the lumpy cylindrical vegetable but these bizarre animals are echinoderms—an invertebrate like starfish, sea urchins, and feather stars.

The class Holothruoidea is better known by as the sea cucumbers. Sea cucumbers are cylindrical echinoderm animals with feathery tentacles at the mouth end of their bodies. They are often mistakenly called worms.

2015年1月1日 · The body of the sea cucumber is surrounded by a relatively thick and often leather-like body wall, which is the main edible organ (processed as beche-de-mer). Five ambulacral areas run along the length of the body from the mouth to the anus.

Sea cucumbers are mostly bottom or gravel feeders. The pharynx is located behind the mouth. It is surrounded by ten calcareous plates forming a ring. In most cucumbers, this ring is attached to the muscles that retract tentacles. Some sea cucumber species possess stomach and esophagus, while in others, the pharynx opens directly into the intestine.